alluvial cone

alluvial cone
   A semi-conical type of alluvial fan with very steep slopes; it is higher, narrower, and steeper (e.g., > 40% slopes) than a fan, and composed of coarser, and thicker layers of material deposited by a combination of alluvial episodes and to a much lesser degree, landslides (e.g., debris flow). Coarsest materials tend to concentrate at the cone apex.
   Compare: alluvial fan, talus cone.
   SW

Glossary of landform and geologic terms. 2013.

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Look at other dictionaries:

  • alluvial cone — ☆ alluvial cone n. a steep, narrow, cone shaped alluvial fan formed where a swift stream suddenly slows down, as where an upland stream emerges abruptly into a level plain * * * …   Universalium

  • alluvial cone — ☆ alluvial cone n. a steep, narrow, cone shaped alluvial fan formed where a swift stream suddenly slows down, as where an upland stream emerges abruptly into a level plain …   English World dictionary

  • alluvial cone — noun a fan shaped deposit where a fast flowing stream flattens out • Syn: ↑alluvial fan • Hypernyms: ↑geological phenomenon * * * noun : an alluvial fan with steep slopes * * * alluvial fan or alluvial cone …   Useful english dictionary

  • alluvial cone —   an alluvial fan with highly steep slopes usually found where mountain streams exit narrow valleys …   Geography glossary

  • alluvial fan — Physical Geog. a fan shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also called alluvial cone. [1870 75] * * * ▪ geological feature  unconsolidated… …   Universalium

  • alluvial fan — /əˌluviəl ˈfæn/ (say uh.loohveeuhl fan) noun a fan shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also, alluvial cone …  

  • alluvial fan — noun a fan shaped deposit where a fast flowing stream flattens out • Syn: ↑alluvial cone • Hypernyms: ↑geological phenomenon …   Useful english dictionary

  • Alluvial fan — An alluvial fan is a fan shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain. A convergence of neighboring alluvial fans into a single apron of deposits against a… …   Wikipedia

  • alluvial fan — noun A cone shaped heap of alluvium deposited by a river …   Wiktionary

  • alluvial fan —    A low, outspread mass of loose materials and/or rock material, commonly with gentle slopes, shaped like an open fan or a segment of a cone, deposited by a stream (best expressed in semiarid regions) at the place where it issues from a narrow… …   Glossary of landform and geologic terms

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